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Ricoh declares new $1,400 21mm F2.4 ED Restricted DC WR lens, set for November launch: Digital Images Assessment


When used for distant topics comparable to landscapes, the lens assures strong, uniform picture rendition throughout the picture area. By additional closing the aperture down, it delivers sharp, clear, high-resolution pictures, even on the edges. Its optical traits change for close-range images. At open aperture, it offers a gentle bokeh (defocused) impact within the background whereas capturing the principle topic in sharp, crisp focus. This allows the topic to face out in opposition to a defocused background, with the exaggerated perspective typical of ultra-wide-angle lenses. At a minimal focusing distance of seven inches (18 centimeters), it could create a wide range of visible expressions, relying on the topic being captured.

To realize a pretty exterior design, the lens barrel, hood and cap have been meticulously machined from high-grade aluminum. In each means, this lens is an distinctive imaging device that can convey higher pleasure and inspiration to images.

2. Distinctive optics incorporating the most recent optical applied sciences

The lens optics incorporate a complete of 5 glass parts: 4 ED (Additional-low Dispersion) glass parts—together with one ED aspherical lens—and one Tremendous ED (Additional-low Dispersion) glass optical ingredient to attenuate chromatic aberration and stop coloration bleeding, not solely in the principle in-focus space, but additionally within the surrounding defocused areas. It additionally encompasses a large-aperture unfavourable meniscus optical ingredient, a biconvex aspherical glass-mold optical ingredient and a high- refraction glass optical ingredient within the first lens group; this design reduces the lens’s general measurement regardless of the ultra-wide-angle design, whereas delivering excellent imaging efficiency for sharp, crisp pictures with out fuzziness, even within the peripheral areas.

The lens additionally options PENTAX-original Excessive-Definition (HD) Coating. In contrast with typical multi-layer coatings, this high-grade, multi-layer coating reduces the typical reflectance within the seen spectrum to lower than 50 %, successfully minimizing flare and ghost pictures even in demanding lighting situations comparable to backlighting.

3. Inside lens motor AF

The lens encompasses a DC motor contained in the lens barrel—a primary for the Restricted D FA Sequence—to guarantee easy, quiet, high-precision, high-speed autofocus operation. This focusing mechanism offers a quieter drive sound and smoother operation than conventional physique autofocus.

4. Electromagnetic diaphragm mechanism for high-precision publicity management

This lens incorporates the KAF4 mount, with an electromagnetic diaphragm mechanism to guarantee high-precision publicity management when utilized in mixture with suitable digital SLR cameras. It assures easy, worry-free video taking pictures in areas liable to dramatic brightness adjustments, comparable to a stage with quickly altering lighting situations, or a forest with filtered daylight.

Electromagnetic diaphragm management is out there together with the PENTAX Ok-3 Mark III, PENTAX Ok-3 II, PENTAX Ok-3, PENTAX KP, PENTAX Ok-70, PENTAX Ok-50, PENTAX Ok-S2, PENTAX Ok-S1, PENTAX Ok-1 Mark II and PENTAX Ok-1 digicam our bodies. Ricoh advises customers to improve the digicam’s firmware to the most recent model to correctly function the electromagnetic diaphragm mechanism.

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